3 years ago

Find the exact circumference of a circle with an approximate area of 78.5 square feet.

Mathematics

1 answer:

Tresset [83]3 years ago

3 0

Answer:

31.41ft

Step-by-step explanation:

the area A of a circle is πr² = 78.5 square feet

3.1416* r² = 78.5

r² =78.5/3.1416 = 24.987

r = √24.987 = 4.999ft

the circumference C of a circle is 2πr

C = 2* 3.1416 * 4.999 = 31.41ft

You might be interested in

Find the compound interest on 800 at 5% per annum for 2 years.

Ludmilka [50]

Answer:

$C = 82$

Step-by-step explanation:

Given

$R = 5\%$ -- Rate

$P = 800$ -- Principal

$N = 2$ -- Time

Required

Determine the compound interest

First, we calculate the Amount (A)

$A = P(1 + R)^N$

$A = 800*(1 + 5\%)^2$

Express % as decimal

$A = 800*(1 + 0.05)^2$

$A = 800*(1.05)^2$

$A = 882$

The compound interest (C) is then calculated as:

$C = A -P$ i.e. Amount - Principal

$C = 882 - 800$

$C = 82$

7 0

2 years ago

Which equation can be used to solve the following word problem?

ra1l [238]

A is definitely the answer.

3 0

3 years ago

Read 2 more answers

Solve for x.<br> 7x = 42

Brut [27]

Answer:

x = 6

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

I neeeeeed help really fast, please!! 0 X 0 = ?

Fiesta28 [93]

The answer is zero 0

6 0

2 years ago

Read 2 more answers

I DESPERATELY NEED HELP PLZ ANSWER THESE QUESTIONS I AM TIMED AND DON"T HAVE MUCH TIME LEFT

Marina CMI [18]

Answer:

Ok I will help you answer the first one the rest yourself?

Step-by-step explanation:

So the question is

6(r-s+t)

we have to time each number by 6

6r-6s+6t

That's how we can simply so the answer is 6r-6s+t

Same thing goes with the others

Hope it helps 0w0

5 0

2 years ago